Now offering Blower Door Testing! Starting at $500

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Home Airtightness Testing & Diagnostics

We assess the airtightness of your home to identify how well it resists unwanted airflow. Using advanced thermal imaging and smoke diagnostics, we pinpoint exactly where leaks are occurring.  Learning from the best, Randy Williams blower door tests Kyle Stumpenhorst's post frame in IL.

Why does airtightness matter?

A tightly sealed home helps block out pollen, dust, and outdoor pollutants—improving indoor air quality and comfort. Most air leakage happens in hidden or undesirable areas, allowing air to enter from basements, attics, or wall cavities. Our testing ensures your home breathes only where it should.

Schedule Today

Randy Williams, Northern Built, Tests my own home!

Originally Built in 1874!

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